Coupling



E. J. KROEGER COUPLING Filed March 1926 IN VEN TOR.

A TTORN Patented 1.5.1. 17, 1928..

UNITEDSTATES] A PATENT OFFICE.

nnwm some museums, or

court-me.

- Application fled Iarche,- 1926. Serial No. cases.

'This invention. relates to pipegjoints or. couplings, and in particular; to "couplings for use in connecting' larfie 1pc .sectlonsin systems such as are insta e for conducting oil, natural gas, etc.

provide asim 1e coupling adapted facili tate laying o a pi e line .of-large pipe sec-' tions and efiective y to sealthe .JQlnt between each section.

' The 'fore oingand tained by t e coupling disclosedin. these companying drawings and described below. It is ,to be understood that the invention is not limited to the specific form thereof shown and described.

Of the accompanying drawings Figure -1' is 'a diametral section in the lmproved coupling installed.

ure '1; and D Figure 3 is a similar-section showing another form of the invention. Referring to the drawings, '10, 10 Indi- .cate adjacent ends of sections of'pipe in a system. The improved coupling of theinvention'is shown generally at. 11 and co m' prises a sleeve formed with a. central 1nwardly projecting rib at 12 providing a for the ends 10 o the pipe sections,; and wlt annular gutters 13, 13 on the inner id 1 j thereof at its ends.

In the gutter's 13 arefitted composite an nular gaskets each comprising an outer rmg 14 of resilient material such as rubber, and; an

inner protecting packin ring 15, of soft dcforma le material Suitable materials, such. aslead or other soft metals, may be employed, for example, in pipe s tems for 01 -The gaskets are .formed with outer peripheral grooves 16 so as to provide spaces in gutters 13 in back stead of t evalve 21, a standard type of isappliedtot The chief object'of; thewinventlon is to through j a pipe system at a joint therein and: show-- a joint of the character descri capa 1e of withstanding the action of rubber-deteriorating fluids.-

e gutter by ri-iretin the other end to sleeve 11. In-

check valve fitting 21"m ay be provided (Figurea). I

In making a joint, the arts are assembled as shown in Fi re 1. Fhe expressing gun e 'ducts :18 and a suitable plastic material 23 adapted tos'et or harden,

such as a cement mixture, as haltum, heavy oils, or the like, is forced mto'the-spa'ces 1n "backof the gaskets under hi h pressure,

I 4 until the back pressure from t e; material other objects are obcloses valves 21. This causes packing rings 15, 15;to be compressed a inst the .pipe

under great pressure so as e ectively'to seal against leakage about'theinner periphery of I 13 soas effectively to seal against leaka e through the gutters about the outer peri-p eries of the gaskets. Hardening of the ma ter al 23 holds the gaskets permanently under the action of the compressive forces,

thus producing a permanent seaL- The. invention is. capable of wide applioetion in many industries.=- For examp e','-m systems for conducting acids in which earthenware, hard rubber or other acid resisting, materials are employed for the Ipipe sections,

which arubber gasket is:

employed will provide a very. efiective acid-proof.-.seal..

Modifications of the invention maybe resortedto without departing'irom the spirit thereof or the sec of the appended claims. What i s claims is: 1. plpegol-nt comprising an element'on one p1pe en embracing another said element having a gutter on t 'e' inside.

lpe end,

herein" "in" thereof, a 'rubbergasket fitted in the gutter defining a space about the gasket within the gutter, said gutter being adapted to be sup lied. with a fluid ressuremedium for san space, and a pac 'ng ring .Within the gutter of soft deformable material adapted to protect the rubber gasket from the action of any fluid inthe system tending to deteriorate rubber. '2. 'A-pipe joint com rising inner and outer telescoplng pipe mem ers,tne outer member having an internal circumferential oove formed therein, a gasket of deformab e material positioned within the radially inner portion of said -fioove and surroundmgsaid r a fluid pressure medium inner pipe mem under 7 pressure within the space in-said groove surrounding said gasket for radially compressing said gasket ageinsiz seid inner pipe member, and means intermediate said ressure medium and said gasket for sealmg the space in said groove.

3. A pipe coupling including a sleeve having 2iv channel on its inner surface a gasket fitted in said channel, said gaslieit comprising an inner layer. of flexible material and an outer layer of rubber, seid sleeve having an inlet leading to said channel, a. no closure for said inlet, and an initially plastic medium in the channel and around. the gasket forced through said inlet into the channel under pressure and hardened in situ.

JOHN KRQEGER, 

